<?php

class zip
{
    var $datasec, $ctrl_dir = array();
    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
    var $old_offset = 0;
    var $dirs = Array(".");
    
    function get_List($zip_name)
    {
        $ret = '';
        $zip = @fopen($zip_name, 'rb');
        if (!$zip) {
            return (0);
        }
        $centd = $this->ReadCentralDir($zip, $zip_name);
        @rewind($zip);
        @fseek($zip, $centd['offset']);
        for ($i = 0; $i < $centd['entries']; $i++) {
            $header                  = $this->ReadCentralFileHeaders($zip);
            $header['index']         = $i;
            $info['filename']        = $header['filename'];
            $info['stored_filename'] = $header['stored_filename'];
            $info['size']            = $header['size'];
            $info['compressed_size'] = $header['compressed_size'];
            $info['crc']             = strtoupper(dechex($header['crc']));
            $info['mtime']           = $header['mtime'];
            $info['comment']         = $header['comment'];
            $info['folder']          = ($header['external'] == 0x41FF0010 || $header['external'] == 16) ? 1 : 0;
            $info['index']           = $header['index'];
            $info['status']          = $header['status'];
            $ret[]                   = $info;
            unset($header);
        }
        return $ret;
    }
    
    function Add($files, $compact)
    {
        if (!is_array($files[0])) {
            $files = Array(
                $files
            );
        }
        for ($i = 0; $files[$i]; $i++) {
            $fn = $files[$i];
            if (!in_Array(dirname($fn[0]), $this->dirs)) {
                $this->add_Dir(dirname($fn[0]));
            }
            if (basename($fn[0])) {
                $ret[basename($fn[0])] = $this->add_File($fn[1], $fn[0], $compact);
            }
        }
        return $ret;
    }
    
    function get_file()
    {
        $data    = implode('', $this->datasec);
        $ctrldir = implode('', $this->ctrl_dir);
        return $data . $ctrldir . $this->eof_ctrl_dir . pack('v', sizeof($this->ctrl_dir)) . pack('v', sizeof($this->ctrl_dir)) . pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
    }
    
    function add_dir($name)
    {
        $name = str_replace("\\", "/", $name);
        $fr   = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
        $fr .= pack("V", 0) . pack("V", 0) . pack("V", 0) . pack("v", strlen($name));
        $fr .= pack("v", 0) . $name . pack("V", 0) . pack("V", 0) . pack("V", 0);
        $this->datasec[] = $fr;
        $new_offset      = strlen(implode("", $this->datasec));
        $cdrec           = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
        $cdrec .= pack("V", 0) . pack("V", 0) . pack("V", 0) . pack("v", strlen($name));
        $cdrec .= pack("v", 0) . pack("v", 0) . pack("v", 0) . pack("v", 0);
        $ext = "\xff\xff\xff\xff";
        $cdrec .= pack("V", 16) . pack("V", $this->old_offset) . $name;
        $this->ctrl_dir[] = $cdrec;
        $this->old_offset = $new_offset;
        $this->dirs[]     = $name;
    }
    
    function CompileZipFile($filename, $tozipfilename, $ftype = 'dir')
    {
        if (@function_exists('gzcompress')) {
            if ($ftype == 'dir') {
                $filelist = $this->ListDirFiles($filename);
            } else if ($ftype == 'file') {
                $filelist[] = $filename;
            } else {
                $filelist = $filename;
            }
            $i = 0;
            if (count($filelist) > 0) {
                foreach ($filelist as $filename) {
                    if (is_file($filename)) {
                        $i++;
                        $fd = fopen($filename, "r");
                        if (filesize($filename) > 0) {
                            $content = fread($fd, filesize($filename));
                        } else {
                            $content = ' ';
                        }
                        fclose($fd);
                        
                        $this->add_File($content, $filename);
                    }
                }
                $out = $this->get_file();
                $fp  = fopen($tozipfilename, "w");
                fwrite($fp, $out, strlen($out));
                fclose($fp);
            }
            return $i;
        } else {
            return 0;
        }
    }
    
    function ListDirFiles($dirname)
    {
        $files = array();
        if (is_dir($dirname)) {
            $fh = opendir($dirname);
            while (($file = readdir($fh)) !== false) {
                if (strcmp($file, '.') == 0 || strcmp($file, '..') == 0) {
                    continue;
                }
                $filepath = $dirname . '/' . $file;
                if (is_dir($filepath)) {
                    $files = array_merge($files, $this->ListDirFiles($filepath));
                } else {
                    array_push($files, $filepath);
                }
            }
            closedir($fh);
        } else {
            $files = false;
        }
        return $files;
    }
    
    function add_File($data, $name, $compact = 1)
    {
        $name  = str_replace('\\', '/', $name);
        $dtime = dechex($this->DosTime());
        
        $hexdtime = '\x' . $dtime[6] . $dtime[7] . '\x' . $dtime[4] . $dtime[5] . '\x' . $dtime[2] . $dtime[3] . '\x' . $dtime[0] . $dtime[1];
        eval('$hexdtime = "' . $hexdtime . '";');
        if ($compact)
            $fr = "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00" . $hexdtime;
        else {
            $fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00" . $hexdtime;
        }
        $unc_len = strlen($data);
        $crc     = crc32($data);
        if ($compact) {
            $zdata = gzcompress($data);
            $c_len = strlen($zdata);
            $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
        } else {
            $zdata = $data;
        }
        $c_len = strlen($zdata);
        $fr .= pack('V', $crc) . pack('V', $c_len) . pack('V', $unc_len);
        $fr .= pack('v', strlen($name)) . pack('v', 0) . $name . $zdata;
        $fr .= pack('V', $crc) . pack('V', $c_len) . pack('V', $unc_len);
        $this->datasec[] = $fr;
        $new_offset      = strlen(implode('', $this->datasec));
        if ($compact) {
            $cdrec = "\x50\x4b\x01\x02\x00\x00\x14\x00\x00\x00\x08\x00";
        } else {
            $cdrec = "\x50\x4b\x01\x02\x14\x00\x0a\x00\x00\x00\x00\x00";
        }
        $cdrec .= $hexdtime . pack('V', $crc) . pack('V', $c_len) . pack('V', $unc_len);
        $cdrec .= pack('v', strlen($name)) . pack('v', 0) . pack('v', 0);
        $cdrec .= pack('v', 0) . pack('v', 0) . pack('V', 32);
        $cdrec .= pack('V', $this->old_offset);
        $this->old_offset = $new_offset;
        $cdrec .= $name;
        $this->ctrl_dir[] = $cdrec;
        return true;
    }
    
    function DosTime()
    {
        $timearray = getdate();
        if ($timearray['year'] < 1980) {
            $timearray['year']    = 1980;
            $timearray['mon']     = 1;
            $timearray['mday']    = 1;
            $timearray['hours']   = 0;
            $timearray['minutes'] = 0;
            $timearray['seconds'] = 0;
        }
        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
    }
    
    function ExtractAll($zn, $to)
    {
        if (substr($to, -1) != "/") {
            $to .= "/";
        }
        $files = $this->get_List($zn);
        $cn    = count($files);
        if (is_array($files)) {
            for ($i = 0; $i < $cn; $i++) {
                if ($files[$i]['folder'] == 1) {
                    @mkdir($to . $files[$i]['filename'], $GLOBALS['cfg_dir_purview']);
                    @chmod($to . $files[$i]['filename'], $GLOBALS['cfg_dir_purview']);
                }
            }
        }
        $this->Extract($zn, $to);
    }
    
    function Extract($zn, $to, $index = Array(-1))
    {
        $ok  = 0;
        $zip = @fopen($zn, 'rb');
        if (!$zip) {
            return (-1);
        }
        $cdir      = $this->ReadCentralDir($zip, $zn);
        $pos_entry = $cdir['offset'];
        if (!is_array($index)) {
            $index = array(
                $index
            );
        }
        for ($i = 0; isset($index[$i]); $i++) {
            if (intval($index[$i]) != $index[$i] || $index[$i] > $cdir['entries']) {
                return (-1);
            }
        }
        for ($i = 0; $i < $cdir['entries']; $i++) {
            @fseek($zip, $pos_entry);
            $header          = $this->ReadCentralFileHeaders($zip);
            $header['index'] = $i;
            $pos_entry       = ftell($zip);
            @rewind($zip);
            fseek($zip, $header['offset']);
            if (in_array("-1", $index) || in_array($i, $index)) {
                $stat[$header['filename']] = $this->ExtractFile($header, $to, $zip);
            }
            
        }
        fclose($zip);
        return $stat;
    }
    
    function ReadFileHeader($zip)
    {
        $binary_data        = fread($zip, 30);
        $data               = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);
        $header['filename'] = fread($zip, $data['filename_len']);
        if ($data['extra_len'] != 0) {
            $header['extra'] = fread($zip, $data['extra_len']);
        } else {
            $header['extra'] = '';
        }
        $header['compression']     = $data['compression'];
        $header['size']            = $data['size'];
        $header['compressed_size'] = $data['compressed_size'];
        $header['crc']             = $data['crc'];
        $header['flag']            = $data['flag'];
        $header['mdate']           = $data['mdate'];
        $header['mtime']           = $data['mtime'];
        if ($header['mdate'] && $header['mtime']) {
            $hour            = ($header['mtime'] & 0xF800) >> 11;
            $minute          = ($header['mtime'] & 0x07E0) >> 5;
            $seconde         = ($header['mtime'] & 0x001F) * 2;
            $year            = (($header['mdate'] & 0xFE00) >> 9) + 1980;
            $month           = ($header['mdate'] & 0x01E0) >> 5;
            $day             = $header['mdate'] & 0x001F;
            $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
        } else {
            $header['mtime'] = time();
        }
        $header['stored_filename'] = $header['filename'];
        $header['status']          = "ok";
        return $header;
    }
    
    function ReadCentralFileHeaders($zip)
    {
        $binary_data = fread($zip, 46);
        $header      = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);
        if ($header['filename_len'] != 0) {
            $header['filename'] = fread($zip, $header['filename_len']);
        } else {
            $header['filename'] = '';
        }
        if ($header['extra_len'] != 0) {
            $header['extra'] = fread($zip, $header['extra_len']);
        } else {
            $header['extra'] = '';
        }
        if ($header['comment_len'] != 0) {
            $header['comment'] = fread($zip, $header['comment_len']);
        } else {
            $header['comment'] = '';
        }
        if ($header['mdate'] && $header['mtime']) {
            $hour            = ($header['mtime'] & 0xF800) >> 11;
            $minute          = ($header['mtime'] & 0x07E0) >> 5;
            $seconde         = ($header['mtime'] & 0x001F) * 2;
            $year            = (($header['mdate'] & 0xFE00) >> 9) + 1980;
            $month           = ($header['mdate'] & 0x01E0) >> 5;
            $day             = $header['mdate'] & 0x001F;
            $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
        } else {
            $header['mtime'] = time();
        }
        $header['stored_filename'] = $header['filename'];
        $header['status']          = 'ok';
        if (substr($header['filename'], -1) == '/') {
            $header['external'] = 0x41FF0010;
        }
        return $header;
    }
    
    function ReadCentralDir($zip, $zip_name)
    {
        $size = filesize($zip_name);
        if ($size < 277) {
            $maximum_size = $size;
        } else {
            $maximum_size = 277;
        }
        @fseek($zip, $size - $maximum_size);
        $pos   = ftell($zip);
        $bytes = 0x00000000;
        
        while ($pos < $size) {
            $byte  = @fread($zip, 1);
            $bytes = ($bytes << 8) | Ord($byte);
            if ($bytes == 0x504b0506) {
                $pos++;
                break;
            }
            $pos++;
        }
        $data = @unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size', fread($zip, 18));
        if ($data['comment_size'] != 0) {
            $centd['comment'] = fread($zip, $data['comment_size']);
        } else {
            $centd['comment'] = '';
            $centd['entries'] = $data['entries'];
        }
        $centd['disk_entries'] = $data['disk_entries'];
        $centd['offset']       = $data['offset'];
        $centd['disk_start']   = $data['disk_start'];
        $centd['size']         = $data['size'];
        $centd['disk']         = $data['disk'];
        return $centd;
    }
    
    function ExtractFile($header, $to, $zip)
    {
        $header             = $this->readfileheader($zip);
        $header['external'] = (!isset($header['external']) ? 0 : $header['external']);
        if (substr($to, -1) != "/") {
            $to .= "/";
        }
        if (!@is_dir($to)) {
            @mkdir($to, $GLOBALS['cfg_dir_purview']);
        }
        if (!($header['external'] == 0x41FF0010) && !($header['external'] == 16)) {
            if ($header['compression'] == 0) {
                $fp = @fopen($to . $header['filename'], 'wb');
                if (!$fp) {
                    return (-1);
                }
                $size = $header['compressed_size'];
                while ($size != 0) {
                    $read_size   = ($size < 2048 ? $size : 2048);
                    $buffer      = fread($zip, $read_size);
                    $binary_data = pack('a' . $read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size -= $read_size;
                }
                fclose($fp);
                touch($to . $header['filename'], $header['mtime']);
            } else {
                $fp = @fopen($to . $header['filename'] . '.gz', 'wb');
                if (!$fp) {
                    return (-1);
                }
                $binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']), Chr(0x00), time(), Chr(0x00), Chr(3));
                fwrite($fp, $binary_data, 10);
                $size = $header['compressed_size'];
                while ($size != 0) {
                    $read_size   = ($size < 1024 ? $size : 1024);
                    $buffer      = fread($zip, $read_size);
                    $binary_data = pack('a' . $read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size -= $read_size;
                }
                
                $binary_data = pack('VV', $header['crc'], $header['size']);
                fwrite($fp, $binary_data, 8);
                fclose($fp);
                $gzp = @gzopen($to . $header['filename'] . '.gz', 'rb') or die("Cette archive est compress");
                if (!$gzp) {
                    return (-2);
                }
                $fp = @fopen($to . $header['filename'], 'wb');
                if (!$fp) {
                    return (-1);
                }
                $size = $header['size'];
                while ($size != 0) {
                    $read_size   = ($size < 2048 ? $size : 2048);
                    $buffer      = gzread($gzp, $read_size);
                    $binary_data = pack('a' . $read_size, $buffer);
                    @fwrite($fp, $binary_data, $read_size);
                    $size -= $read_size;
                }
                fclose($fp);
                gzclose($gzp);
                touch($to . $header['filename'], $header['mtime']);
                @unlink($to . $header['filename'] . '.gz');
            }
        }
        return true;
    }
}